1DRB
CRYSTAL STRUCTURE OF UNLIGANDED ESCHERICHIA COLI DIHYDROFOLATE REDUCTASE. LIGAND-INDUCED CONFORMATIONAL CHANGES AND COOPERATIVITY IN BINDING
Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A, B (A, B) | DIHYDROFOLATE REDUCTASE | polymer | 159 | 18008.4 | 2 | UniProt (P0ABQ4) Pfam (PF00186) | Escherichia coli | |
| 2 | C, F (A, B) | CHLORIDE ION | non-polymer | 35.5 | 2 | Chemie (CL) | |||
| 3 | D, H (A, B) | METHOTREXATE | non-polymer | 454.4 | 2 | Chemie (MTX) | |||
| 4 | E, I (A, B) | ETHANOL | non-polymer | 46.1 | 2 | Chemie (EOH) | |||
| 5 | G (B) | CALCIUM ION | non-polymer | 40.1 | 1 | Chemie (CA) | |||
| 6 | J, K (A, B) | water | water | 18.0 | 426 | Chemie (HOH) |
Sequence modifications
A, B: 1 - 159 (UniProt: P0ABQ4)
| PDB | External Database | Details |
|---|---|---|
| Cys 27 | Asp 27 | conflict |
| Asp 37 | Asn 37 | conflict |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 2 |
| Total formula weight | 36016.8 | |
| Non-Polymers* | Number of molecules | 7 |
| Total formula weight | 1112.0 | |
| All* | Total formula weight | 37128.8 |
